package com.sora.gulimall.product.service.impl;

import com.sora.gulimall.product.entity.AttrEntity;
import com.sora.gulimall.product.service.AttrService;
import com.sora.gulimall.product.vo.AttrGroupWithAttrsVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sora.common.utils.PageUtils;
import com.sora.common.utils.Query;

import com.sora.gulimall.product.dao.AttrGroupDao;
import com.sora.gulimall.product.entity.AttrGroupEntity;
import com.sora.gulimall.product.service.AttrGroupService;


@Service("attrGroupService")
public class AttrGroupServiceImpl extends ServiceImpl<AttrGroupDao, AttrGroupEntity> implements AttrGroupService {

    @Autowired
    AttrService attrService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrGroupEntity> page = this.page(
                new Query<AttrGroupEntity>().getPage(params),
                new QueryWrapper<AttrGroupEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public PageUtils queryPage(Map<String, Object> params, Long categoryId) {

        if(categoryId == 0){
            IPage<AttrGroupEntity> page = this.page(
                    new Query<AttrGroupEntity>().getPage(params),
                    new QueryWrapper<AttrGroupEntity>()
            );

            return new PageUtils(page);
        }else{
            String key = (String)params.get("key");

            // 构造查询语句（对于复杂的查询，需要自己构建）
            // select * from tbl where catelog_id = ? and (attr_group_id = key or attr_group_name like %key%) limit 0,10

            // QueryWrapper构造查询条件,需要查哪张表，泛型就写哪张表的实体类
            QueryWrapper<AttrGroupEntity> wrapper = new QueryWrapper<AttrGroupEntity>().eq("catelog_id", categoryId);
            if(!StringUtils.isEmpty(key)){
                wrapper.and((obj) ->{
                    obj.eq("attr_group_id", key).or().like("attr_group_name", key);
                });
            }

            // 这个方法接收两个参数，第一个是有关分页的（page,limit）,第二个是业务查询参数，然后将两者封装在一起
            IPage<AttrGroupEntity> page = this.page(
                    new Query<AttrGroupEntity>().getPage(params),
                    wrapper
            );

            return new PageUtils(page);
        }
    }

    /**
     * 根据分类id查出所有的分组以及这些组里面的属性
     * @param catelogId
     * @return
     */
    @Override
    public List<AttrGroupWithAttrsVo> getAttrGroupWithAttrsByCatelogId(Long catelogId) {
        //com.atguigu.gulimall.product.vo
        //1、查询分组信息
        List<AttrGroupEntity> attrGroupEntities =
                this.list(new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId));

        //2、查询所有属性
        List<AttrGroupWithAttrsVo> collect = attrGroupEntities.stream().map(group -> {
            AttrGroupWithAttrsVo attrsVo = new AttrGroupWithAttrsVo();
            BeanUtils.copyProperties(group,attrsVo);
            List<AttrEntity> attrs = attrService.getRelationAttr(attrsVo.getAttrGroupId());
            attrsVo.setAttrs(attrs);
            return attrsVo;
        }).collect(Collectors.toList());

        return collect;
    }

}